guarded (adj.)

• aloof
• apprehensive
• armed
• backward
• bashful
• blank
• bridled
• buried
• cagey
• calculating
• canny
• careful
• cautious
• chary
• chilly
• circumspect
• cloaked
• cold
• concealed
• considerate
• constrained
• controlled
• cool
• copyrighted
• covered
• covert
• curbed
• custodial
• defended
• deliberate
• detached
• discreet
• distant
• eagle-eyed
• expressionless
• forbidding
• frigid
• frosty
• gingerly
• hawk-eyed
• heedful
• hesitant
• hidden
• icy
• impassive
• impersonal
• inaccessible
• incredulous
• inhibited
• introverted
• invulnerable
• judicious
• keen-eyed
• leery
• lidless
• loath
• mindful
• modest
• noncommittal
• observant
• offish
• open-eyed
• patented
• pawky
• pent-up
• politic
• privy
• protected
• prudent
• regardful
• reluctant
• remote
• removed
• repressed
• reserved
• restrained
• retarded
• reticent
• retiring
• safe
• sharp-eyed
• sheltered
• shielded
• shrinking
• skeptical
• sleepless
• standoffish
• subdued
• suppressed
• suspecting
• suspicious
• tentative
• thorough
• unadventurous
• unapproachable
• uncommunicative
• uncongenial
• undemonstrative
• unenterprising
• unexpansive
• unpersuadable
• vigilant
• wary
• watchful
• withdrawn